feat: #2647 - added a refresh gesture to edit product page

[monsieurtanuki]

Impacted file:

• edit_product_page.dart: added a refresh gesture; refactored not creating a Scaffold variable anymore

What

• Added a refresh gesture to edit product page.

Fixes bug(s)

• Closes: Allow slide down to refresh the product in edit mode #2647

[codecov-commenter]

Codecov Report

Merging #2649 (2f262e8) into develop (2ea0da3) will decrease coverage by 1.48%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           develop   #2649      +/-   ##
==========================================
- Coverage     8.86%   7.38%   -1.49%     
==========================================
  Files          161     215      +54     
  Lines         6623   10352    +3729     
==========================================
+ Hits           587     764     +177     
- Misses        6036    9588    +3552     

Impacted Files	Coverage Δ
...kages/smooth_app/lib/widgets/attribute_button.dart	0.00% <0.00%> (-92.00%)	⬇️
...s/smooth_app/lib/data_models/user_preferences.dart	8.73% <0.00%> (-23.57%)	⬇️
packages/smooth_app/lib/themes/smooth_theme.dart	60.00% <0.00%> (-22.98%)	⬇️
...p/lib/generic_lib/dialogs/smooth_alert_dialog.dart	15.11% <0.00%> (-19.10%)	⬇️
...mooth_app/lib/data_models/product_preferences.dart	24.65% <0.00%> (-6.78%)	⬇️
packages/smooth_app/lib/main.dart	14.16% <0.00%> (-3.73%)	⬇️
.../smooth_app/lib/pages/onboarding/welcome_page.dart	0.00% <0.00%> (-3.13%)	⬇️
.../smooth_app/lib/pages/onboarding/scan_example.dart	0.00% <0.00%> (-2.28%)	⬇️
...p/lib/pages/onboarding/consent_analytics_page.dart	0.00% <0.00%> (-1.57%)	⬇️
...smooth_app/lib/pages/product/new_product_page.dart	0.00% <0.00%> (-0.88%)	⬇️
... and 227 more

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